12 Aquarii

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12 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 04m 04.74s
Declination -05° 49′ 23.08″
Apparent magnitude (V) 5.89
Characteristics
Spectral type G4III
U−B color index 0.41
B−V color index 0.68
Astrometry
Radial velocity (Rv) 1.1 km/s
Proper motion (μ) RA: 22.4 mas/yr
Dec.: 4.0 mas/yr
Parallax (π) 6.03 ± 1.17 mas
Distance approx. 500 ly
(approx. 170 pc)
Absolute magnitude (MV) 7.4
Details
Mass 1.1 M
Radius 1.1 R
Luminosity 1.2 L
Temperature 5,000–6,000 K
Metallicity ?
Rotation ?
Age ? years
Orbit
Companion 12 Aquarii B
Semi-major axis (a) 0.1"
Orbit
Companion 12 Aquarii C
Semi-major axis (a) 2.4"
Inclination (i) 195°
Other designations
HD 200497, ADS 14592 A, GC 29417, PPM 204770, BD-06° 5664A, GCRV 13234, SAO 145065, MCA 66Aa, CCDM J21041-0549A, HR 8059, STF 2745A, CSI-06 5664 2, IDS 20588-0613 A, WDS J21041-0549A.
Database references
SIMBAD data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

12 Aquarii is a double star in the constellation Aquarius. Its apparent magnitude is 5.53 and absolute magnitude is 7.4, making it less bright than our sun comparatively. 12 Aquarii is a yellow sub-giant that is slightly larger and heavier than our sun.

Components[edit]

NAME Right ascension Declination Apparent magnitude (V) Spectral type Database references
12 Aquarii B (CSI-06 5664 1) 21h 04m 04.58s -05° 49' 24.2 7.31 A3V Simbad
12 Aquarii C (CSI-06 5664 3) 21h 04m 04.7247s -05° 49' 23.038 5.53 G4 Simbad

References[edit]